It only happens when I load up a core. I’ve noticed the wiimote correctly appears as just one controller before loading a core.
p.s. on a side note I was having trouble with my nunchuck and other accessories connected to my wiimote being recognised by Retroarch which searching led to this topic. It turned out the problem was the battery charge was low. I can use my Mayflash fighting stick connected to my wiimote with Retroarch with puae Amiga core 